Water-tube boiler.



PATBNTED APR. 14, 1903.

J. P. SNEDDON.

WATER TUBE BOILER.

APPLICATION PIILED NOV. 1, 1902.

NO MODEL.

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ATEN'I OFFICE.

JAMES P. SNEDDON, or BARBERTON, OHlO, Assleuonro STIRLING COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

WATER-TUBE BOILER.

SPECIFICATION formingpart of Letters Patent No. 725,600, dated April 14, 1903.

Application filed November 1, 1902. Serial No. 129,693. (No model.)

To all whom it may concern:

Be it known that I, J AMEs P. SNEDDON, of

Barberton, Summit county, Ohio, have invented a new and useful Water-Tube Boiler, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in whichsteam and water drums; "and the object of the invention is to bring the tubes entering one:

header in closer proximity to those of the next, thus decreasing thefree area through which the gases rise and the space required for a boiler of given horse-power, while in-' creasing the efficiency of the boiler.

In the drawings, 2 and 3 represent two series of frontheaders, the headers 2 beinginthe same vertical plane, while the others are in another plane slightly in the rear thereof.'

The rear edges of the headers 2 slightly overlap the front edges of the headers 3, the amount of the lap being such that the tubes 4, connected to the inner headers 3, can be withdrawn through the space between the front row 2. The amount ofthis side lap is preferably substantially equal to the thickness of the metal in the side walls of the headers to provide for theremoval 'of the tubes.

The rear headers 5 and 6 are arranged in two rows in the same manner as the front headers, the tubes of the headers 2 connecting to the headers 5, while those of the head-' ers 3 connect to the rear row 6. The tubes are thus made all of the same length, and the headers are all duplicates of each other,while the tubes arebrought closer together than is possible where the headers are all in the same row. In the previous constructions there is a space of at least one-half an inch left between the side walls of the headers, thus bringing the tubes of one header much farther from those of the next than is desirable,

- whereas with my construction, using the two rows with a slight overlap, the distance between the centers of the headers is reduced about an inch.

' The row 2 of the front headers is shown as nippled to a cross-box or water lintel 7 at the bottom over the firing-doors, and the row 3 is similarly nippled to a second box or lintel 8/ The corner headers of the row 2 are extended downwardly to form water-legs 9, and I preferably similarly extend one or more of the intermediate headers 2 between the firing- .doors, as set forth in my copending application, Serial No. 127,505, filed October 16, 1902. The corner headers of therow 5 are also extended down to form supporting water-legs 10.

I have shown a single steam and water drum 11 connected by two sets of tubes 12 and 13 with the front headers and by tubes 14 with the rear headers.

The lower tubes 15 at the sides of the firebox are preferably made square or rectangularin cross-section between the headers and are shown as of greater diameter than the upper tubes 4, which are arranged in pairs connected to each header.

Owing to the jogged form of the inner faces of the headers, small clearance-spaces are formed between the rear edges of the front row 2 and the 'front faces of the rear row 3, this being similar with the rear headers; but these clearance-spaces will not 'afiect the action of the boiler.

The advantages of my invention result from the overlapping of the headers, which brings the tubes close together, aids in the distribution of the gases, and increases the efficiency of theboilerr The form and arrangement of the headers, tubes, drum or drums,aud other parts of the boiler, as well as the manner of overlapping the headers, may be varied without departing from my invention.

I claim- 1. A water-tube boiler having vertically-extending front headers arranged in two sets in di'lferent planes and overlapping each other, rear headers arranged in two similarly-staggered sets, tubes connecting each set of front headers with the corresponding set of rear headers, both sets of said tubes being inclined in the same direction, and an upper steam and water drum connected to both sets of headers at one end of the boiler; substantially as described.

2. Awater-tube boiler having vertically-extending sinuous front headers arranged in two sets in different vertical planes and overlapping each other, the headers of the two sets terminating at substantially the same levels, sinuous rear headers arranged in two similar staggered sets at a different level, tubes connecting each set of front headers with the corresponding set of rear headers, and an upper steam and water drum at one end of the boiler extending above and connected to both sets of the headers at said end; substantially as described.

3. A water-tube boiler having vertically-extending front headers in two sets in different planes and overlapping each other, the outermost headers having depending corner waterlegs, rear headers arranged in two similar staggered sets of which the outermost headers have depending supporting water-legs, tubes connecting each set of the front headers with the corresponding set of rear headers, both sets of said tubes being inclined in the same direction, and an upper steam and water drum connected to both sets of. the headers at one end of the boiler; substantially as described.

4. A water-tube boiler having front headers staggered and arranged in different vertical planes with overlapping side edges, and two lower substantially parallel boxes to which the lower ends of said front headers are connected one of said boxes being located back of the other; substantially as described.

5. Awater-tube boilerhaving front and rear sets of vertically-extending sinuous headers connected by inclined tubes, the alternate headers of each set being staggered, the tubes connecting the headers being of substantially the same length and all inclined in the same direction, and an upper steam and water drum connected to the headers; substantially as described.

6. A water-tube boiler having front and rear headers connected by inclined tubes, an upper steam and water drum connected to the front headers by vertical tubes or nipples, and to the rear headers by horizontally-extending tubes, the headers of each set being arranged in two rows with overlapping edges, and water boxes or lintels connected to the lower ends of the front headers; substantially JAS. P. SNEDDON.

Witnesses:

E. F. BAKER, O. D. EVERHARD. 

